CN1914809A - Audio accessory optimization system - Google Patents
Audio accessory optimization system Download PDFInfo
- Publication number
- CN1914809A CN1914809A CNA200480027509XA CN200480027509A CN1914809A CN 1914809 A CN1914809 A CN 1914809A CN A200480027509X A CNA200480027509X A CN A200480027509XA CN 200480027509 A CN200480027509 A CN 200480027509A CN 1914809 A CN1914809 A CN 1914809A
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- China
- Prior art keywords
- audio
- annex
- optimization system
- radio device
- audio accessory
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
- G06Q20/36—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes
- G06Q20/367—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes involving electronic purses or money safes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
Abstract
An audio accessory optimization system(100) includes an audio accessory(104) that couples to a radio(102), the audio accessory including a memory(112) containing a plurality of descriptors(116, 118, 120) that provide information to enable radio optimization of the accessory audio performance.
Description
Technical field
The present invention relates generally to annex, more specifically, relates to the audio accessory of portable communication device.
Background technology
Many portable radio products possess built-in microphone and loud speaker.In these products, utilize these built-in acoustic components to optimize audio performance.Optional audio accessory also can be used for radio device, although and the designer attempt to make the performance classes of this audio accessory to be similar to the audio performance of radio device, this is rough comparison.Therefore, these audio accessories can not be realized the acoustic frequency response of wishing most that annex transducer (microphone and loud speaker) can produce usually.
At present, the design radio device is provided to the analog audio interface of attached audio accessory.Place in radio device with difference in annex and be: the modification from the audio performance of system attachment side is considered to difficulty and expensive.Thereby the annex acoustic frequency response is determined with the radio device Audio Processing that is generally the built-in sound components design of radio device by the acoustic response of annex to a great extent.Because use different element and housing, annex is different with the acoustic response of radio device, thereby annex can not work in the audio quality level that it can reach.
The acoustic characteristic that the user is very easy to discover between annex and radio device (and annex and annex) changes.For example, the remote speaker microphone (RSM) with omnidirectional microphone with have identical casings but the RSM of different noise cancellation microphone elements compares, have diverse acoustic response.
Newer radio device has the ability of communicating by letter with the in-line memory that is used for the sign (ID) of annex with battery.In-line memory is the device or the device subclass that can be positioned over desired location (being this annex in the case), and its data content can be read by teleprocessing unit.The example of in-line memory is the 1-wire that can obtain from Dallas Semiconductor
Bus EEPROM.1-wire
Bus is single line electric power and data communication bus system, and it has the monobus main frame, is generally microprocessor and one or more slave.For id information is provided, in this annex, comprised in-line memory in annex.At present, this in-line memory only is used to identify this accessory model; Radio software is necessary for all accessory model storage operation configurations that are intended for use in radio device.Although it is upgradeable that some radio device is a quickflashing, and therefore can programme to it, to understand and to support annex in the future, it may be not easy to such radio device of upgrading.In addition, it is scalable that many radio devices are designed to non-client, and it estimates all following annexes for radio software has increased a large amount of burdens.Therefore, need be a kind of improved for various annexes provide the audio optimization system of measurable unified behavior, and need to allow realization this for all very portable system of current and following radio device.
Description of drawings
Think that novel feature of the present invention lists in detail in claims.By also in conjunction with the accompanying drawings, can understand the present invention and further target and advantage best with reference to following explanation.In the accompanying drawings, identical reference numeral is represented components identical, and wherein:
Fig. 1 is the block diagram according to audio accessory optimization system of the present invention; And
Fig. 2 is a radio device, has audio accessory coupled, that operate according to the present invention.
Embodiment
Although this specification summarizes the claim that qualification is regarded as novel feature of the present invention, believe by considering that following explanation also in conjunction with the accompanying drawings, can understand the present invention better.In each accompanying drawing, use identical reference number.As described in the background technology, newer radio device has the ability of communicating by letter with the in-line memory that is used for the sign (ID) of annex with battery.For this id information is provided in annex, in annex, comprised such as 1-wire
The embedded memory device of bus EEPROM (EMD), it comprises 4 bytes " accessory identifier " of this annex.At present, this 4 byte accessory identifier is used for the most basic accessory characteristics (mainly being to open what interface) of form inquiry in this radio software.The memory organization structure of the present annex EMD of form 1 expression.
Form 1
| Memory offset (hexadecimal) | Content |
| 0x0000 | 4 byte accessory ID string |
| 0x0004 | White space (inessential) |
| 0x0005 | White space (inessential) |
| … | … |
| -EOF- | White space (inessential) |
According to the present invention, a kind of audio optimization scheme provided herein, wherein, audio accessory comprises in-line memory, and this memory also has accessory configuration data (ACD) except ID (being used for backward compatibility).This ACD comprises data descriptor, with the parameterized information of audio balance that acoustic characteristic, ability and suggestion about this annex are provided, makes winner's radio device that best possible Audio Processing can be provided, and comes to optimize audio performance by annex.Whole information needed of this annex of Optimizing operation are present in (in in-line memory) among this annex itself, in case connect this annex, can be conducted interviews by this main radio device.Parameterized information among the ACD provides the improvement to known audio accessories, because this information is easy to resolve, and can be by radio device, or even radio models is in the future understood.This forms contrast with the audio accessory that only comprises accessory identifier.
With reference now to Fig. 1,, shows block diagram according to audio accessory optimization system 100 of the present invention.System 100 comprises radio device 102, and it has coupled remote audio accessory 104.Radio device 102 can be portable or mobile radio apparatus.Remote audio accessory 104 can be remote speaker microphone, headset, automobile adapter or other outside audio frequency apparatus that connects.Radio device 102 comprises controller 106 and bus interface 108, is preferably 1-wire
Bus interface.Although preferred for simplicity 1-wire
Bus, but those skilled in the art will know that replaceable is parallel or universal serial bus memory.This audio accessory 104 can comprise voicefrequency circuit 110, and it can comprise loud speaker and/or microphone, perhaps other audio frequency apparatus.According to the present invention, such as 1-wire
The in-line memory equipment (EMD) 112 of EEPROM is included in the annex 104, and annex 104 comprises accessory configuration data 114.Accessory configuration data 114 contains accessory identifier 116 and at least one audio descriptor, and for example 118 and 120.According to the present invention, audio descriptor 118 and 120 embodies about the audio capability of annex and the information of acoustical behavior, comprises the equalization filter of interface parameters, performance model, suggestion and the performance constraint that realizes the performance optimization of audio accessory 104.Audio descriptor 118 and 120 can comprise the data of any amount, and it defers to some forms of having set up, to allow by this radio device parsing.Concrete audio frequency parameter is stored in the field 122, and each descriptor has at least one field.In given annex, all audio frequency parameters can be stored in the single descriptor, and all parameters also can be stored in each descriptor, and perhaps parameter can be carried out logic groups in a plurality of descriptors.Logic groups, this preferable methods has made things convenient for and has reused, because similarly parameter often all occurs in given annex or all do not occur.
As the example of descriptor field logic groups, consider to store two microphones of audio frequency parameter formed according to the present invention.One of two microphones are remote speaker microphone (RSM), also comprise loud speaker.The audio frequency parameter related with this microphone element divides into groups in the field 122 of audio descriptor #1 118.In two microphones, all there is this descriptor.Divide into groups in the field (not shown) of audio descriptor #2 120 with the audio frequency parameter of loudspeaker association.This descriptor exists only in this remote speaker microphone, because only there is it to have loud speaker.By related special audio parts or ability and coupling descriptor, can with the various combinations of other audio accessory in reuse descriptor itself.The method has simplified descriptor construction and radio device is resolved.
Descriptor itself is as the part storage of accessory configuration data, and it can be considered a kind of data structure.Those skilled in the art will know, exist a lot of modes to organize and visit audio descriptor and accessory configuration data.Such tissue even can comprise the classification of descriptor.In order to guarantee maximum flexibility in the future in supporting annex, radio device must be able to detect the audio descriptor of a plurality of random lengths, and it must ignore the descriptor that can not discern.Descriptor can comprise and adds the annex field that this describes afterbody to along with the time.
This audio optimization system 100 also can provide fail safe to subsidiary data.Encryption or digital signature technology can use on the basis of each descriptor, and perhaps overall applicability is in accessory configuration data.These safe practices guarantee that imitated annex inferior can not together use with this radio device.
Fig. 2 represents radio device 202, and it has coupled audio accessory 204 formed according to the present invention, for example remote speaker microphone.Radio device 202 and audio accessory 204 bases are in audio optimization system illustrated in fig. 1.Top explanation represents how information to be encoding to in-line memory, and it becomes the part of audio accessory 204 according to the present invention.Thereby audio accessory optimization system of the present invention 100 these in-line memorys of expansion with the information that comprises that in its data content main radio device 202 is required, utilize this audio accessory 204 thereby optimize.
Transmit ACD content to radio device 202 with predetermined format from annex 204, it comprises audio frequency and parameters,acoustic set, can include but not limited to the quantity of audio interface type, audio mode and signaling configuration, duplex ability, reception audio frequency parameter and transmission audio frequency parameter.Provide the example of ACD content information below:
1. audio interface type (simulation, numeral, mix, do not have)-allow this radio device to close this audio-frequency power amplifier, if do not need it, perhaps needs it the time provide digital audio to predetermined port.
Audio mode and signaling the configuration quantity.For example, if RSM has the jack of plug and play earphone, but still the microphone among the use RSM, then can utilize two kinds of audio modes to set up this system, the different parameters that provides for each pattern is provided these two kinds of audio modes.
3. duplex ability (continuously full duplex, signal full duplex, single worker).Some annexes, headset for example, can full duplex (say simultaneously and listen), and other, for example RSM then can not.This radio device can receive full-duplex audio, and if connect single worker's annex, then must operate in " hands-free " pattern.Know what done that this radio device must be known the audio capability of annex.
4. receive audio frequency parameter (being generally the loudspeaker in the annex)
A. power amplifier (PA) pattern or line mode.This will illustrate that simulation output will operate in the power mode of volume setting by the volume control button setting of radio device, or the fixing line mode of output voltage gain.
B. transducer load impedance (ohm).By designated conversion device load impedance, externally use different loudspeaker impedances in the audio accessory.This has given for this radio device and has limited its output and do not produce the ability of distortion, because can be owing to the electric current slicing causes distortion in than impedance speakers.This also provides the method for suitable restriction with protection audio frequency output transistor that be provided with for this radio device.
C. prevent the Maximum Output Level (for example, volt RMS) of transducer damage.If surpass this level, will cause that annex damages.Good example may be the use of earphone or earplug.These equipment can not use greater than the audio signal of (＞) 10Vpp (many radio devices can produce this signal), otherwise will cause damaging.
D. in the effective acoustic pressure level (SPL) of standard frequency, level and position.This will be used to measure the audio frequency that annex is providing polyphony.Compare with the loudness level of ringing very much, this radio device can change the equilibrium of low loudness level.This also can be used for auxiliary limit exposure in very high SPL level, and prevents that user's ear is impaired.
E. to allow this radio device be model cone displacement to taper envelope parameters-these parameters, if the source is a complicated wave form.This modeling can be used for zooming appearance in the saturated and distortion of predict cone displacement, and for this radio device provides a kind of method, eliminates with distortion estimator when handle be valuable (for example compression).
F. produce the equalization filter of flat response at the standard monitoring position.
Ii)-iv) whole below this in-line memory standard can provide, and allow this radio device select to utilize its available filter when minimum current drain.
I) nonessential-this loud speaker output itself smooth (for example, may be the situation of line audio).
Canonical form IIR (infinite impulse response) filter that ii) has coefficient.This is that this radio device should be applied to this audio frequency (before driving this audio frequency PA), to realize the DSP filter coefficient standard of flat response in annex output.
Canonical form FIR (finite impulse response) filter that iii) has coefficient.This is that this radio device should be applied to this audio frequency (before driving this audio frequency PA), to realize another DSP filter coefficient standard of flat response in annex output.
Iv) standard form semi-octave band equalizer coefficients.This is that this radio device should be applied to this audio frequency (before driving this audio frequency PA), to realize the standard of another filter of flat response in annex output.
5. send audio frequency parameter (being generally the microphone in the annex)
A. minimum microphone bias voltage.The bias voltage that provides on microphone line is provided most of analog audio accessories, and this radio device capacitively connects the input audio frequency.The microphone bias voltage of portable radio apparatus can be 4V, and mobile radio apparatus may be 8V.
B. maximum microphone bias voltage.Must limit this microphone bias voltage, to prevent to damage internal microphone elements.Most microphone element holds out against the following voltage of 10V.
C. microphone electrical model parameters.These parameters will be with the difference between canonical form account for voltage source microphone and current source microphones.Voltage source microphone (Low ESR) is not almost changing aspect the sensitivity of the function of selecting as the microphone bias resistance of radio device.(be generally active electret (electret) microphone element) in current source microphones, this sensitivity is selected directly to be directly proportional with this microphone bias resistance.Realize that these modeling parameters will be given the method that this radio device is estimated sensitivity of microphone if know its (radio device) microphone bias.
D. the sensitivity of microphone of normal place, frequency, load.This information is used for according to absolute SPL calibration incoming level, and to allow this radio device be that analog input suitably is provided with front-end gain, to obtain suitable speech level.Secondly, this information is used for the absolute noise level that assesses user stands.This absolute noise level can be used for triggering the change of microphone path equilibrium and/or speaker equalization then.Must and can not only carry out these changes based on SPL based on the microphone output voltage that changes with each annex.
E. microphone acoustic model.Wish to know that microphone is how as operating about the function of the position of sound source (lip).Under most situation, along with microphone moves from its nominal position, frequency response and sensitivity will change.Having such model parameter can make radio device optimization voice under situation about changing answer.
I) sensor type (omnidirectional, noise cancellation).This is the part of model.
Ii) with the response change of distance.Can comprise frequency response change with variable in distance.
F. equalization filter.The situation of similar reception audio frequency can be improved transmitting audio frequency by suitable equilibrium.In quiet environment, people may be preferably based on the equilibrium of voice, and in being full of the environment of very large noise, more wish smooth noise equalization.This in-line memory standard can provide following all i)-vii), and allow this radio device select which uses.
I) nonessential.
Under the situation of transmission line input, this may select for the equalizer of hope.
The canonical form iir filter that ii) has the coefficient of flat source correction.In this case, the source may the finger speech sound.
The canonical form FIR filter that iii) has the coefficient of flat source correction.
The standard form semi-octave band equalizer coefficients that iv) is used for flat source correction.
The canonical form iir filter that v) has the coefficient of flat noise correction.In high-noise environment, the equilibrium of smooth background noise may be preferred.
The canonical form FIR filter that vi) has the coefficient of flat noise correction.
The standard form semi-octave band equalizer coefficients that vii) is used for flat noise correction.
Utilize foregoing information, radio device 202 can be adjusted its configuration, and therefore, annex 204 can be with the audio quality operation of optimizing.
Audio accessory optimization system of the present invention provides several advantages for prior art.Information is encoding to the memory that embeds annex allows to utilize resolution rules to make up radio software, but this software does not need to estimate all product configurations.The radio device of making in certain year can use some or all function of the annex that designs after the several years.Utilize safe practice in the audio descriptor to prevent the unauthorized operation of imitated annex.This in-line memory data content framework is a backward compatibility, and its permission if desired, can utilize existing wireless product to upgrade annex formed according to the present invention.
Therefore, a kind of audio optimization system is provided, wherein, audio accessory comprises the in-line memory of the information with audio balance of describing its acoustic characteristic, function and suggestion, make winner's radio device that best possible audio-source can be provided, with the audio performance of optimization, and all annexes are operated to unify mode from this annex.Audio accessory optimization system of the present invention has been expanded the in-line memory data content, to comprise the information that main radio device is required in this memory, utilizes this audio accessory thereby optimize.By expanding this memory data content to comprise the explanation of finishing of annex, it is easy to be resolved by host software, in a single day the required full detail of this annex of Optimizing operation is present in this annex itself, and connects this annex, can visit these information by this main radio device.Increase memory data content audio descriptors and make system can improve accessory audio quality, simplified radio device software and provide multistage function for annex.The digital signature of descriptor of the present invention allows to make up further safe coefficient in annex, makes client or annex competitor can not change, duplicate or reuse this in-line memory data content easily.
Although explained and illustrated the preferred embodiments of the present invention, will be clear that the present invention is not restricted to this.Those skilled in the art can carry out a large amount of modifications, variation, distortion, alternative and equivalent, and does not break away from spirit of the present invention and scope by the claims definition.
Claims (10)
1. audio accessory optimization system comprises:
Radio device; And
Be connected to the audio accessory of described radio device, this audio accessory comprises in-line memory, and this in-line memory contains the information that makes described radio device optimize the audio performance of described annex.
2. the described audio accessory optimization system of claim 1, wherein, described radio device is a portable radio apparatus.
3. the described audio accessory optimization system of claim 1, wherein, described radio device is a mobile radio apparatus.
4. the described audio accessory optimization system of claim 1 wherein, is contained in information in the described in-line memory with the hierarchical approaches tissue pocket.
5. the described audio accessory optimization system of claim 1, wherein, the information that is included in the described in-line memory is used to produce the digital signature of encryption, and this digital signature also is stored in the described in-line memory.
6. the described audio accessory optimization system of claim 1, wherein, described in-line memory uses single bus data communication instrument.
7. the described audio accessory optimization system of claim 6, wherein, described single bus data communication instrument comprises 1-wire
Bus.
8. audio accessory optimization system comprises:
Has the audio accessory that is stored in content information wherein, described content information is used to transmit the information about the acoustic characteristic of this annex, described annex is connected in a plurality of radio devices, wherein, each in these a plurality of radio devices detect described content information and as to its response and optimize the audio frequency of described annex.
9. the described audio accessory optimization system of claim 8, wherein, described content information comprises one of following at least: the quantity of audio interface type, audio mode and signaling configuration, duplex ability, reception audio frequency parameter, send audio frequency parameter and receiver to transmitter transducer coupling parameter.
10. the described audio accessory optimization system of claim 9, wherein, described reception audio frequency parameter comprises one of following at least: power amplifier pattern, line mode, transducer load impedance, Maximum Output Level, effective acoustic pressure level (SPL), taper envelope parameters and equalization filter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/669,033 US20050064822A1 (en) | 2003-09-23 | 2003-09-23 | Audio accessory optimization system |
| US10/669,033 | 2003-09-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1914809A true CN1914809A (en) | 2007-02-14 |
Family
ID=34313642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200480027509XA Pending CN1914809A (en) | 2003-09-23 | 2004-09-20 | Audio accessory optimization system |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20050064822A1 (en) |
| KR (1) | KR20060095983A (en) |
| CN (1) | CN1914809A (en) |
| AU (1) | AU2004306079A1 (en) |
| MX (1) | MXPA06003189A (en) |
| WO (1) | WO2005031986A2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7171239B2 (en) * | 2004-05-25 | 2007-01-30 | Motorola, Inc. | Selecting common features of accessories coupled to a communications device |
| US8675130B2 (en) * | 2010-03-04 | 2014-03-18 | Thx Ltd | Electronic adapter unit for selectively modifying audio or video data for use with an output device |
| US9077756B1 (en) * | 2012-03-05 | 2015-07-07 | Symantec Corporation | Limiting external device access to mobile computing devices according to device type and connection context |
| US9763193B2 (en) | 2015-06-18 | 2017-09-12 | Motorola Solutions, Inc. | Battery life extension for a communication device |
| CN105228049B (en) * | 2015-10-16 | 2019-02-26 | 惠州Tcl移动通信有限公司 | The earphone and its application method and mobile terminal of a kind of reproducible sound effect parameters |
| US10148112B2 (en) | 2016-09-28 | 2018-12-04 | Motorola Solutions, Inc. | System, method, and apparatus for charging a battery-powered accessory from a primary battery-powered device |
| US10452584B2 (en) * | 2018-02-01 | 2019-10-22 | Motorola Solutions, Inc. | Multimode audio accessory connector |
| US10356497B1 (en) * | 2018-10-31 | 2019-07-16 | Ian Brown | Removable environmental microphone and radio cover assembly |
| US11720318B2 (en) | 2021-12-17 | 2023-08-08 | Motorola Solutions, Inc. | Audio accessory with high and low impedance paths to a speaker, and a radio for the audio accessory |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5301360A (en) * | 1991-05-06 | 1994-04-05 | Motorola, Inc. | Digital option select system |
| US5649307A (en) * | 1995-07-28 | 1997-07-15 | Motorola, Inc. | Method and apparatus for option control in a radio accessory |
| US5881103A (en) * | 1995-08-03 | 1999-03-09 | Motorola, Inc. | Electronic device with equalized audio accessory and method for same |
| US6009184A (en) * | 1996-10-08 | 1999-12-28 | Umevoice, Inc. | Noise control device for a boom mounted noise-canceling microphone |
| US6097943A (en) * | 1997-07-02 | 2000-08-01 | Telefonaktiebolaget L M Ericsson | Application bound parameter storage |
| US6005367A (en) * | 1998-07-14 | 1999-12-21 | Centurion International, Inc. | Smart power system |
| US6725061B1 (en) * | 1999-01-12 | 2004-04-20 | Qualcomm, Incorporated | System and method for the automatic identification of accessories coupled to a wireless communication device |
| US6859538B1 (en) * | 1999-03-17 | 2005-02-22 | Hewlett-Packard Development Company, L.P. | Plug and play compatible speakers |
| DK1250829T3 (en) * | 2000-01-25 | 2003-09-22 | Widex As | Method and system for generating a calibrated sound field |
| US7457750B2 (en) * | 2000-10-13 | 2008-11-25 | At&T Corp. | Systems and methods for dynamic re-configurable speech recognition |
| US6961790B2 (en) * | 2001-06-29 | 2005-11-01 | Motorola, Inc. | Self-extracting re-configurable interface used in modular electronic architecture |
| US7050783B2 (en) * | 2002-02-22 | 2006-05-23 | Kyocera Wireless Corp. | Accessory detection system |
| US7483540B2 (en) * | 2002-03-25 | 2009-01-27 | Bose Corporation | Automatic audio system equalizing |
-
2003
- 2003-09-23 US US10/669,033 patent/US20050064822A1/en not_active Abandoned
-
2004
- 2004-09-20 WO PCT/US2004/030642 patent/WO2005031986A2/en active Application Filing
- 2004-09-20 AU AU2004306079A patent/AU2004306079A1/en not_active Abandoned
- 2004-09-20 MX MXPA06003189A patent/MXPA06003189A/en not_active Application Discontinuation
- 2004-09-20 KR KR1020067005727A patent/KR20060095983A/en not_active Application Discontinuation
- 2004-09-20 CN CNA200480027509XA patent/CN1914809A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005031986A2 (en) | 2005-04-07 |
| KR20060095983A (en) | 2006-09-05 |
| WO2005031986A3 (en) | 2006-02-02 |
| US20050064822A1 (en) | 2005-03-24 |
| AU2004306079A1 (en) | 2005-04-07 |
| MXPA06003189A (en) | 2006-06-23 |
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